It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. The above command is to create an Android app project. Why it works when I enter manually in terminal from user 'ashish' account but not with php?
Any help will be appreciated :. The question is a bit old, but for those who experience this problem can try to set the environment variables of direct on the server. PHP uses the putenv function. Specify the full path to android , or set your path via something like this:. Sign up to join this community. The best answers are voted up and rise to the top. Note : If a program is started with this function, in order for it to continue running in the background, the output of the program must be redirected to a file or another output stream.
Failing to do so will cause PHP to hang until the execution of the program ends. Note : On Windows exec will first start cmd. If you want to start an external program without starting cmd.
Submit a Pull Request Report a Bug. Parameters command The command that will be executed. Return Values The last line from the result of the command. Returns false on failure. Notes Warning When allowing user-supplied data to be passed to this function, use escapeshellarg or escapeshellcmd to ensure that users cannot trick the system into executing arbitrary commands. This is for linux users only. You may use it to start a process or join an exisiting PID process.
This is a way of doing it. Windows does not work. I too wrestled with getting a program to run in the background in Windows while the script continues to execute. This method unlike the other solutions allows you to start any program minimized, maximized, or with no window at all. I tried to execute a command in background under Windows. Hope this saves someone else an hour or two. This is written in exec manual page. There are cases where you need the output to be logged somewhere else though.
There is better control and platform independence. In any case it needs to be deleted before proceeding. As far as error checking on the last example.
Note that the PATH may not be as complete as you need. Your account must have admin privileges. To change the account go to console services, right click on the Apache service, choose properties, and select the connection tab. This combination destroys the string value returned from the call. I get binary garbage. Shell scripts that start with! A solution is to force a clean environment. Be careful as to how you elevate privileges to your php script. It's a good idea to use caution and planing.
It is easy to open up huge security holes. Here are a couple of helpful hints I've gathered from experimentation and Unix documentation. Trying to us the following code failed badly with various results: like "unable to fork", "access denied", "empty results", depending on what settings I used, This functions are generally considered harmful,without proper input validation procedures are as worse as eval.
Lets make it even clearer, about the "unable to fork" error in exec. By default Windows XP sets all permissions for cmd. That overrides everthing. Even more on the "unable to fork" error. It was driving me crazy! Yet still it failed. It wasn't until I got desperate that I happened to look in "special permissions. Of course deny overrides everything else. This was a newly set up install of XP pro. It must be the default of something I'd guess IIS to set this deny permission just to make our lives miserable.
See if ot helps you all guys Hope it helps you guys.. This one had me confused longer than it should have! Hope this saves others from the same fate! Just to clarify, background shell exec ing is not the same as a fork under Unix. It would be useful if PHP supported fork like Perl and other scripting languages do. Simply exec 'ing a process and sending it to the background is not the same.
A true fork copies the current environment and duplicates the running script so that there are two instances, one child, one parent. The child and parent can determine which copy they are and then take separate courses of execution paths based on that. Often one copy will perform some "busy work" while the other returns to normal execution.
But no matter what, both functions live within the same code rather than a separate, external program. The more I go over my notes the less I care for the last two functions.
The user usually the anonymous login must have execute permissions on cmd. For example, in C the spawn and exec functions do not try to open a shell, they create the new process directly. PHP creates the new process via cmd. This is good for those of you who are trying to run batch files but this is very ineffecient for running other.
0コメント